H216O (left vertical scale) and H218O (pink, right vertical scale) production rates in comet Lovejoy from Odin observations. Horizontal scale is the time relative to perihelion (30.069 January 2015 UT) in days, minus the expected delay between peak outgassing and peak intensity due to beam dilution and opacity effect for a periodic outgassing with similar periodicity. Production rates are apparent production rates computed in the stationary regime assumption. For H216O the larger error bar includes a 5% uncertainty due to the 10′′ pointing uncertainty. H218O uncertainty is dominated by statistical noise. The least square fit to the combined production rate (last line of Table 1) is overplotted.
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